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#20S proteasome

2 public questions tagged with this topic.

Protein

The major difference between 20S and 26S proteasomes is:

26S proteasome requires ATP, while 20S does not accurately describes the key difference, similarity, or comparative feature asked about in this question. In Protein Degradation, the ability to compare and contrast related concepts is essential for deeper understanding. The distinguishing feature described by 26S proteasome requires ATP, while 20S does not reflects fundamental differences in structure, function, mechanism, or origin between the compared entities. The other options (20S proteasome requires ATP, while 26S does not, 26S proteasome degrades DNA, while 20S degrades proteins, and 20S proteasome is located in the nucleus, while 26S is in the cytoplasm) either state incorrect comparisons, confuse the properties of the entities being compared, or describe features that are actually shared rather than different.

Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 4

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Protein

The 20S proteasome primarily:

Degrades unfolded proteins is the scientifically accurate answer to this question. Within the study of Protein Degradation, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of Degrades unfolded proteins directly address what is being asked. Among the other options, Synthesizes new proteins, Produces ATP, and Assembles ribosomes do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common misconceptions about this topic.

Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 4

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